Trimming Mark Placement for Print Data Generation
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Solution Overview
Problem
Conventional print data generation methods often result in misalignment during trimming and folding processes, leading to printer's marks being left on the printed material due to narrow bleed margins and off-registration issues, especially when using offline finishers.
Innovation Solution
A print data generation apparatus that determines the appropriate sheet for trimming and prints printer's marks only on the front sheet of a batch of printing paper, allowing for precise control of trimming marks placement based on imposition settings, thereby minimizing misalignment and ensuring printer's marks are not left on the finished product.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If printer's marks are printed on all sheets of printing paper, then trimming can be performed on all sheets, but printer's marks may be left on the printed material due to misalignment during trimming
Solution Approach 1:
The patent applies local quality by printing printer's marks only on the first sheet of the batch rather than on all sheets. This localized approach provides sufficient trimming reference for the batch while eliminating the harmful effect of marks appearing on finished materials from subsequent sheets.
Solution Approach 2:
The patent implements preliminary action by printing the trimming mark on the first sheet in advance, establishing a reference point before the batch is processed. This allows the trimming to be performed accurately on all sheets using the mark from the first sheet as guidance, without needing to print marks on every sheet.
2Area of stationary object
If bleed margin is narrowed to maximize printing area, then more content can be printed, but misalignment during trimming causes printer's marks to appear on the finished product
Solution Approach 1:
The patent uses local quality by concentrating the trimming reference function on the first sheet only, allowing other sheets to have minimal or no bleed margin. This enables maximization of printing area on sheets 2 and beyond while maintaining trimming precision through the localized mark on the first sheet.
Solution Approach 2:
The patent segments the trimming reference function from the actual trimming process. The printer's mark is printed only on the first sheet to establish the reference, while the trimming operation is applied uniformly to the entire batch, separating the reference creation from the reference usage.
3Reliability
If printer's marks are printed on sheets requiring fold processing, then folding can be guided, but fold misalignment combined with narrow bleed increases risk of marks appearing on finished material
Solution Approach 1:
The patent applies local quality by printing the printer's mark only on the first sheet, which serves as the reference for both folding and trimming operations. This localized marking provides sufficient guidance for fold processing while eliminating the risk of marks appearing on finished materials from subsequent sheets, even when fold misalignment occurs.
Solution Approach 2:
The patent implements preliminary action by establishing the trimming reference on the first sheet before folding and trimming operations. This advance placement of the mark allows the fold and trim processes to use it as a guide, ensuring accurate positioning without requiring marks on all sheets.
Data Source
AI summary
A print data generation apparatus that accepts a setting as to whether or not to control the position of trimming marks for document data to be printed, determines the imposition setting of the document data to be printed, and decides the position of the trimming marks on the printing paper on which the document data to be printed is placed, in accordance with the determination findings and according to the setting to perform the position control. Drawing data that represents the trimming marks is generated according to the position of the trimming marks so decided, in order to generate the print data. The drawing data that represents the trimming marks is generated such that the trimming marks are added to the trimming marks on the first sheet of the batch of sheets of printing paper, and not to the other sheets of the batch of sheets of printing paper.